CN104417304B - Vehicle suspension system and method of controlling vehicle suspension system - Google Patents
Vehicle suspension system and method of controlling vehicle suspension system Download PDFInfo
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- CN104417304B CN104417304B CN201410418318.1A CN201410418318A CN104417304B CN 104417304 B CN104417304 B CN 104417304B CN 201410418318 A CN201410418318 A CN 201410418318A CN 104417304 B CN104417304 B CN 104417304B
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- plunger
- chamber
- suspension system
- hollow bar
- fluid
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-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/0416—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics regulated by varying the resiliency of hydropneumatic suspensions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
- B60G15/08—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring
- B60G15/12—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring and fluid damper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/06—Characteristics of dampers, e.g. mechanical dampers
- B60G17/08—Characteristics of fluid dampers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/063—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid comprising a hollow piston rod
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/064—Units characterised by the location or shape of the expansion chamber
- F16F9/065—Expansion chamber provided on the upper or lower end of a damper, separately there from or laterally on the damper
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
- F16F9/46—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/10—Acceleration; Deceleration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/20—Speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/50—Pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/50—Pressure
- B60G2400/51—Pressure in suspension unit
- B60G2400/512—Pressure in suspension unit in spring
- B60G2400/5122—Fluid spring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/50—Pressure
- B60G2400/51—Pressure in suspension unit
- B60G2400/518—Pressure in suspension unit in damper
- B60G2400/5182—Fluid damper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/10—Damping action or damper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/20—Spring action or springs
- B60G2500/206—Variable pressure accumulators for hydropneumatic suspensions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/30—Height or ground clearance
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
Abstract
A vehicle suspension system enables active control of pre-load, spring rate, and ride height by using a fluid damper housing defining an interior chamber containing an incompressible fluid and a hollow rod supporting a piston extending into the interior chamber. The housing is movable relative to the hollow rod such that fluid volume in the interior chamber varies. A multi-chambered manifold is operatively connected to the hollow rod and has a first gas chamber in fluid communication with a second gas chamber. A first plunger, a second plunger, and a third plunger are supported by the manifold. A first actuator is operable to move the third plunger to vary a volume of the first gas chamber between the first and third plungers. A second actuator is operable to move the second plunger to vary a volume of the second gas chamber in communication with the first gas chamber.
Description
Technical field
Present invention generally comprises the method for vehicle suspension system and control suspension system.
Background technology
Bunper assembly is used in vehicle suspension system, and the energy of the road forces of wheel of vehicle is applied to dissipation, so as to
Control the transmission of the power of unsprung vehicle mass.Some suspension systems are passive, are preloaded so as to vehicle, spring
Rigidity and suspension system height are to design the nonadjustable single predetermined value for determining by Bunper assembly.In some systems
In, preload, spring rate and suspension system height be it is variable, but carry out not in a controlled manner.Other hang
Frame system is actively controlled, so as to the suspension system height of vehicle can change.Other suspension systems allow spring rate or preload
Lotus adjusts.
The content of the invention
A kind of vehicle suspension system is provided, which realizes pre- by using the fluid buffer connected with multi-chamber gas spring
The active control of load, spring rate and suspension system height.Specifically, there is provided a kind of vehicle suspension system, which includes housing,
The housing defines the internal chamber containing incompressible fluid and supports the hollow of the piston that extends into internal chamber
Bar.Housing is movable relative to hollow bar, so as to the fluid volume in internal chamber chamber changes.Multi-chamber house steward operatively connect
It is connected to hollow bar and with the first gas chamber and second gas chamber being in fluid communication with selectivity each other.Such as use herein
, when they physically do not close each other, gas chamber " is in fluid communication " each other, and gas therefore can through two chambers it
Between.First plunger, the second plunger and the 3rd plunger are supported by house steward.First plunger extend into first gas chamber and via
Hollow bar and internal chamber are in fluid communication, so as to the first plunger in response to housing relative to the motion of hollow bar relative to first
Gas chamber moves.Second plunger is extended into second gas chamber and is in fluid communication with internal chamber via hollow bar.·
3rd plunger extends into first gas chamber.First actuator is operable as allowing the 3rd plunger motion, to change the first He
The volume of the first gas chamber between the 3rd plunger.Second actuator is operable as allowing the second plunger motion, with change with
The volume of the second gas chamber of first gas chamber in fluid communication and while change internal chamber in fluid volume, with thus
Housing is allowed to move relative to hollow bar.
Thus, Bunper assembly is controlled to supplying on offer first gas chamber and preloads, and realizes low-frequency
Rolling, pitching and fluctuation compensation.And, Bunper assembly can be controlled to change spring rate and suspension system height.It is a kind of
The method of control vehicle suspension system, the vehicle suspension system have the spring carried mass for being connected to tire wheel combination and vehicle
This Bunper assembly between body, methods described include receiving the first input letter for representing that the expectation of Bunper assembly is preloaded
Number, and receive one in the expectation suspension system height of the expectation spring rate and vehicle that represent Bunper assembly second defeated
Enter signal.Method includes controlling the first actuator in response to the first input signal to allow the 3rd plunger motion, thus foundation to buffer
The expectation of device assembly is preloaded, and controls the second actuator to set up the expectation bullet of Bunper assembly in response to the second input signal
The expectation suspension system height of spring rigidity and/or vehicle.
The present invention passes through a kind of vehicle suspension system, including:Housing, defines the internal chamber containing incompressible fluid
With the hollow bar for supporting piston, bar and piston extend into internal chamber, and housing can be moved relative to hollow bar, so as to inner chamber
Fluid volume change in room；Multi-chamber house steward, is operatively connectable to hollow bar and has first gas chamber and the second gas
Fluid chamber；First plunger, the second plunger and the 3rd plunger are supported by house steward；Wherein the first plunger extends into first gas chamber
And be in fluid communication with internal chamber via hollow bar, so as to the first plunger is relative relative to the motion of hollow bar in response to housing
In first gas chamber movement；Wherein the second plunger extends into second gas chamber and via hollow bar and internal chamber fluid
Connection；Wherein the 3rd plunger extends into first gas chamber；First actuator, it is to allow the 3rd plunger motion that can operate, to change
The volume of the first gas chamber between change first and the 3rd plunger；With the second actuator, it is operable as allowing the second plunger motion,
With the volume that changes with the second gas chamber of first gas chamber in fluid communication and while change the fluid body in internal chamber
Product, thus to allow housing to move relative to hollow bar.
Described vehicle suspension system is further included:The quilt in multi-chamber house steward between hollow bar and the first plunger
Dynamic valve module；Wherein passive valve assembly is configured to form pressure drop, so as to the dynamic fluid pressure in hollow bar is more than first
Dynamic fluid pressure at plunger.
In described vehicle suspension system, the second plunger is configured to select when precalculated position is moved to by the second actuator
Stop to selecting property the fluid communication between first gas chamber and second gas chamber.
Described vehicle suspension system is further included:Hollow bar is operatively connected to house steward, so as to press by pipe
Contracting fluid flows through the pipe between hollow bar and house steward.
In described vehicle suspension system, housing and house steward be arranged as it is located adjacent one another, so as to housing motion generally with
The Motion Parallel of the first and second plungers.
Described vehicle suspension system is further included:Controller, is operatively connectable to the first and second actuators；Its
Middle controller is configured in response to the first mode of operation so that the first actuator allows the 3rd plunger motion, thus to adjust the first post
Plug is preloaded, and is configured in response to the second mode of operation so that the second actuator allows the second plunger motion, thus to adjust
Static position of the spring rate and housing of the first plunger relative to hollow bar.
The present invention provides a kind of vehicle, including:Tire wheel combination；Spring carried mass body；Suspension system, including buffer group
Part, the Bunper assembly are operatively connectable to tire wheel combination and are configured to causing wheel relative to spring carried mass body
The power of displacement is managed, and Bunper assembly has:Hydraulic bjuffer, with the housing and support piston that define hydraulic chamber
Hollow bar, bar and piston extend into hydraulic chamber, and housing is fixed to tire wheel combination and hollow bar is fixed to spring
Mounted mass body, housing can be moved relative to hollow bar together with tire wheel combination, so as to the hydraulic fluid body in hydraulic chamber
Product changes；Gas spring, which has:Multi-chamber house steward, is operatively connectable to hydraulic bjuffer and has the first pneumatic chamber
With the second pneumatic chamber；First plunger, the second plunger and the 3rd plunger are supported by house steward；Wherein the first plunger extends into first
Pneumatic chamber and be in fluid communication via hollow bar and hydraulic chamber, so as to the first plunger in response to housing relative to hollow bar fortune
It is dynamic and relative to the first pneumatic chamber movement；Wherein the second plunger extends into the second pneumatic chamber and via hollow bar and hydraulic pressure
Chamber in fluid communication；Wherein the 3rd plunger extends into the first pneumatic chamber；First actuator, it is to allow the 3rd plunger to transport that can operate
It is dynamic, so that the volume of the first pneumatic chamber changes and so that Bunper assembly preloads change；Second actuator, energy
Operation is to allow the second plunger motion, with the volume that changes with the second pneumatic chamber of the first pneumatic chamber in fluid communication and while is changed
Become the hydraulic fluid flow volume in hydraulic chamber, thus to allow the suspension system of spring rate and vehicle of gas spring highly to change
Become；And controller, be operatively connectable to the first and second actuators and be configured to first be caused in response to the first mode of operation
Actuator allows the 3rd plunger motion, and is configured to move in response to the second mode of operation so that the second actuator allows the second plunger.
Described vehicle further includes passive valve assembly, and which is located at the multi-chamber house steward between hollow bar and the first plunger
In and be configured to form pressure drop, so as to the dynamic fluid pressure in hollow bar is more than the dynamic fluid pressure at the first plunger.
In described vehicle, the second plunger is configured to optionally stop when precalculated position is moved to by the second actuator
Fluid communication between first pneumatic chamber and the second pneumatic chamber.
Described vehicle is further included:Hollow bar is operatively connected to house steward, in flowing through so as to hydraulic fluid by pipe
Pipe between empty bar and house steward.
In described vehicle, housing and house steward are arranged as located adjacent one another.
The present invention provide it is a kind of control vehicle suspension system method, vehicle suspension system have be connected to tire wheel group
Bunper assembly between the spring carried mass body of part and vehicle, including:The first input signal is received, which represents Bunper assembly
Expect to preload；The second input signal is received, which represents the expectation suspension system of the expectation spring rate and vehicle of Bunper assembly
One in system height；The first actuator is controlled in response to the first input signal, is preloaded with the expectation for setting up Bunper assembly；
The second actuator is controlled in response to the second input signal, is hanged with the expectation for setting up the expectation spring rate and vehicle of Bunper assembly
One in frame system altitude.
In described method, the first input signal represents that tire wheel combination is in predetermined angle relative to spring carried mass body
Degree.
In described method, the second input signal is represented to be expected in spring rate and suspension system height
The vehicle operators input of adjustment.
Can be easily geographical in the detailed description made to the better model for implementing the present invention carried out below in conjunction with accompanying drawing
The above-mentioned the features and advantages of the present invention of solution and further features and advantages.
Description of the drawings
Fig. 1 is the partial sectional schematic view of a part for vehicle suspension system, and the vehicle suspension system has buffer
Component, which is intercepted in the line 1-1 of Fig. 2, and Bunper assembly is in extended position；
Fig. 2 is the schematic rear view of a part for the vehicle of the suspension system with Fig. 1 and Bunper assembly；
Fig. 3 be the Bunper assembly with Fig. 1 vehicle suspension system a part partial sectional schematic view, the buffering
Device assembly is in an intermediate position；
Fig. 4 is the partial sectional schematic view of a part for the vehicle suspension system of the Bunper assembly with Fig. 1, described slow
Device assembly is rushed in compression position；
Fig. 5 is the partial sectional schematic view of a part for the vehicle suspension system of the Bunper assembly with Fig. 1, buffer
Component is in an intermediate position and the first actuator actuation plunger, is preloaded with changing；
Fig. 6 is the partial sectional schematic view of a part for the vehicle suspension system of the Bunper assembly with Fig. 1, buffer
Component is in an intermediate position and the second actuator actuates another plunger, to change the outstanding of the spring rate and vehicle of Bunper assembly
Frame system altitude；
Fig. 7 is included in the partial sectional schematic view of the passive valve assembly in the Bunper assembly of Fig. 1.
Specific embodiment
Referring to accompanying drawing, wherein identical reference represents identical part in the several figures, and Fig. 1 shows suspension system
10, which includes Bunper assembly 12, and the Bunper assembly is realized preloading, spring rate (spring rate) and suspension system
The active control of system height (ride height), such as herein described；As shown in Fig. 2 vehicle 14 includes suspension system 10.
Specifically, Bunper assembly 12 includes fluid buffer 16, and which has buffer housing 18, and the buffer housing has fixes
To the attachment structure 20 of the non-rotatable hub portion 22 of tire wheel combination 24.Tire wheel combination 24 has tire 26, its dress
Wheel 28 is fitted on, the wheel is rotated via axle shaft 30.Alternatively, control arm 32 and steering STATEMENT OF FEDERALLY SPONSORED 34 are from hub portion 22
Extend.Other suspension frame structures can be used instead, and such as solid axle suspension system, long galianconism (SLA) suspension, many STATEMENT OF FEDERALLY SPONSOREDs are hanged
Frame, pillar or any suitable suspension system.
Fluid buffer 16 has hollow bar 36, and one end thereof is fixed to the spring carried mass body (sprung of vehicle 14
Mass), such as automobile body 17.Alternatively, bar 36 can be fixed to another part of vehicle 14, for example, be fixed to vehicle frame
Component.Dust cap or exterior tube can extend around bar 36, but be removed for purposes of illustration.In vehicle 14 on road
During traveling, the power (such as power F as shown in Figure 2) caused due to uneven road surface can be buffered device assembly 12 and buffer, with
In a large number upper dissipation energy, are delivered to automobile body 17 without excessive road forces, it is ensured that Vehicular occupant is steadily taken.Buffering
Device housing 18 and house steward 40 are arranged adjacent one another.This structure of part allows Bunper assembly 12 in 24 He of tire wheel combination
Easily encapsulate between automobile body 17.Due to flexible pipe as herein described 58, Bunper assembly 12 and house steward 40 can be with various
Different modes are orientated.For example, although buffer housing 18 and house steward 40 are shown as being essentially parallel from one to another, but house steward 40 can replace
Ground is arranged along the wheel cabin of automobile body 17.
Fig. 1 shows gas spring 38 of the Bunper assembly 12 with the house steward 40 with multiple chambers, and the house steward limits
First gas chamber 42 and second gas chamber 44.Chamber 42,44 can be filled with any suitable gas, such as air or nitrogen
Gas.Chamber 42,44 is filled with air in the embodiment shown, and is referred to alternatively as pneumatic chamber.The housing 18 of fluid buffer 16
Internal chamber 45 is formed, the internal chamber is filled with liquid fluid, such as hydraulic fluid.Fluid buffer 16 and gas spring
38 are operatively connected to one another to work successively, used as the hydraulic pressure inflation buffer (hydro- for suspension system 10
Pneumatic damper), there is provided buffer and preload, spring rate and suspension system height adjustment, as in this paper institutes
State.Adaptability buffering can be utilized, such as by fluid buffer 16 is configured to magneto-rheological or other adaptability structures
Make.And, buffer 16 can be configured to dual pipe or triple tube buffer, rather than single tube buffer.
The hollow bar 36 of fluid buffer 16 is extended in buffer housing 18.Bar guiding piece 46 (also referred to as bearing part) exists
The end of internal chamber 45 and it is fixed on inside housing 18 around bar 36.Shaft seal (not shown) can be in the opening of housing 18
Bar 36 is surrounded at 48, beyond guaranteeing that the fluid in the internal chamber 45 of fluid filled drains to opening 48 without bar 36.Piston
50 are fixed on around hollow bar 36.When the tire wheel combination 24 of Fig. 2 is moved relative to automobile body 17, housing 18 relative to
Vehicle body 17 and move relative to the hollow bar 36 for being fixed to vehicle body 17.This causes piston 50 to slide against the inwall of housing 18.It is living
Plug 50 can be formed with passage 52, the passage allow fluid when housing 18 is moved in internal chamber 45 from 50 side of piston to
Up to the opposite side of piston 50.
The house steward 40 of gas spring 38 is formed with the bar passage 56 of fluid passage 54, the fluid passage and hollow bar 36
Hydraulic fluid communication.That is, hollow bar 36 is connected by hollow flexible tube 58 in being directed at the opening 60 of passage 54 in house steward 40
It is connected to house steward 40.In different embodiments, pipe 58 can be flexible or can not be flexibility.Passage 54 is branched off into two points
Subchannel 62,64.House steward 40 is supported on the first plunger 70 in first branched bottom 62 and the second plunger 72 is supported on second
In branched bottom 64.First plunger 70 extend into first gas chamber 42 and relative to house steward 40 slidably, but physically
Limited to by front retainer (positive stop), for example, the cervical region 71 of plunger 70 is kept at its maximum projecting position of Fig. 4
Sealing member or antelabium in passage 62.Similarly, the second plunger 72 extends into second gas chamber 44 and relative to house steward
40 slidably, but is physically limited to by front retainer, such as by the cervical region 73 of plunger 72 at its maximum projecting position of Fig. 6
The sealing member being maintained in passage 64 or antelabium.3rd plunger 74 is supported in first gas chamber 42 by house steward 40.3rd post
Plug 74 relative to house steward 40 slidably, but physically limited to by front retainer, such as will at its maximum projecting position of Fig. 5
The cervical region 75 of the 3rd plunger 74 is maintained at the sealing member at the opening 77 of house steward 40 or antelabium.Second plunger 72 includes another cervical region
78, which extends to the opening 79 of house steward 40 in addition and relative to house steward 40 slidably, but is physically limited to by positive retainer, example
The sealing member such as cervical region 78 of the second plunger 72 being maintained at its maximum projecting position of Fig. 1 at opening 79 or antelabium.
Alternatively, two separate plungers can replace plunger 72 to use, and a plunger has cervical region 73 and another is set to
In adjacent cavity and with cervical region 78, so as to the plunger acted on fluid with cervical region 73 and the effect with cervical region 78
Plunger unlatching connection on gas.In an alternative embodiment, plunger 72 and house steward 40 can be configured to double status architectures,
So as to replace the variable volume of available second chamber 44, unique available running status is first state and the second state,
In first state only first chamber 42 volume can use, and in the second state first chamber 42 and whole second chamber 44 volume
It is available.
In buffer housing 18 as tire wheel combination 24 is moved closer or far from automobile body 17 and relative to hollow
When bar 36 is moved, hydraulic fluid can be forced through hollow bar 36 and pipe 58 and act on the first and second plungers 70,72.I.e.
One and second plunger 70,72 be exposed to via hollow bar 36 and be fluidly connected to the chamber 45 of fluid filled.Refer again to Fig. 1,
The relative motion of road forces and buffer housing 18 causes piston 50 against the buffer housing 18 of motion in the chamber of fluid filled
Moved in room 45 with compressed mode (as shown in Figures 3 and 4) or (as shown in Figure 1) is moved with extension mode.18 phase of buffer housing
For the static pressure in the chamber 45 of motion artifacts (disrupt) fluid filled of sliding plunger 50.The chamber of fluid filled
Fluid in 45 is incompressible.Thus, the position of Fig. 3 or 4 is moved upward in buffer housing 18 from the position of Fig. 1,
When moving downward in buffer housing 18 so as to piston 50, the bar 36 of larger lengths extends into fluid-filled chamber 45, makes
Fluid volume is can use to reduce in obtaining fluid-filled chamber 45.The fluid shifted due to bar 36 travels through bar 36 and through flexible
Pipe 58, to act on the cervical region 71,73 of the first and second plungers 70,72.This causes the first plunger 70 to move further into
In one chamber 42, as shown in the motion from Fig. 1 to Fig. 3, by the gas compression in first chamber 42.Fluid in chamber 45 is to work
Gas in the counteracting force and first chamber 42 of plug 50 buffer housing 18 and tire to the reaction force attenuation of plunger 70
The motion of vehicle wheel component 24, the amount and ratio of buffering depend on described herein second and the 3rd plunger 72,74 relative position.
During in road forces so that buffer housing 18 is alternatively moved away from automobile body 17, for example, move to Fig. 1's from the position of Fig. 3
Position (i.e. extension mode), buffer 16 is to buffer housing 18 when which is relative to 50 slide downward of piston (as shown in Figure 3)
Motion enter row buffering, and the smaller portions of bar 36 are in chamber 45, increase the available space in chamber 45 and reduce the first He
Pressure on second plunger 70,72.Ventilating part to air may be provided in house steward 40 to lead to the plunger 70,72 in Fig. 1
Space at upside, to prevent being vacuum formed in chamber 42,44 when plunger 70,72 is moved upwards.
In order to realize significant buffering, the blowing pressure in gas filling chamber 42,44 must be sufficiently high, with static bar
The fluid force resisted during part and dynamic compression in fluid-filled chamber 45 carries out retroaction.I.e. available cushioning effect is by gas
Inflation situation is limited.But, increase gas inflated pressure meeting sealing member of the increasing action in Bunper assembly 12 and (for example holding
Sealing member (not shown) at mouthfuls 48 around bar 36) on pressure, which increase between sealing member and moving lever 36 relative rubbing
Wipe and need more expensive sealing member.Alternatively, passive valve assembly 80 may include (to exist in the passage 62 of multi-chamber house steward 40
Between hollow bar 36 and the first plunger 70).Passive valve assembly 80 is illustrated in greater detail in the figure 7, and it is dynamic to realize hydraulic fluid
State forms pressure drop during flowing, so as to the dynamic fluid pressure in hollow bar 36 and passage 54 is acted on more than in branched bottom 62
Dynamic fluid pressure on the first plunger 70.In other embodiments, the similar passive valve assembly 80 of function is configured to be formed
The passive valve assembly of pressure drop or other devices can be positioned in opening 60 at (from bar passage 56 to fluid passage 54) or
Dynamic pressure drop is formed between fluid passage 54 and branched bottom 64.This device can be used beyond passive valve assembly 80 or be replaced
Change passive valve assembly 80 to use, depending on the applicable cases of Bunper assembly 12.Passive valve assembly 80 is achieved in lower quiet
State pressure, and lower gas inflated pressure in first chamber 42 is realized, this can be allowed in house steward 40 and each plunger cervical region
71st, using less expensive sealing member between 73,75,78.One such sealing member 81 is shown as being in the logical of house steward 40
Cross between the part that securing member 83 is fixed to one another, securing member is, for example, bolt or any other suitable fastening or interface unit.
Although house steward 40 is shown as two parts kept together by securing member 83, house steward 40 can be single part or can
With two or more part.
Pressure drop is formed through valve module 80 during the dynamic compression of buffer 16, to realize sufficiently high dynamic pressure
Power, while compared with conventional single tube buffer, it is allowed to which lower static pressure is acted on the cervical region 71 of the first plunger 70, and
Thus lower gas inflated pressure is realized in gas filling chamber 42.Referring to Fig. 7, valve module 80 has the first flowing of band logical
The valve body 85 in road 82, first flow channel provide the restriction between passage 54 and branched bottom 62.This can by it is any can
The aperture of metering obtains, as metering method, and can make straight, taper or other shapes.In the embodiment shown, first
Flow channel 82 changes to branched bottom 62 from 54 taper of passage.With from branched bottom 62 to the mobile phase of passage 54 ratio, example
Property valve module 80 is configured to having more restricted from passage 54 to the flowing of branched bottom 62.First flow channel 82 can be
Annular, and compared with the second end near branched bottom 62, there is bigger stream at the first end near passage 54
Dynamic region.Multiple first flow channels 82 are may be formed in valve body 85.Passage 82 can be opened by the alignment of multiple stacking discoid pieces
Mouth is limited, and the discoid pieces are kept together by central securing member 87 and nut 89.Alternatively, valve body 85 can be whole with house steward 40
Close.
Valve module 80 also has second flow path 91, its can be from branched bottom 62 to the circular passage of passage 54 or
Series of passages.Valve module 80 includes one or more check valves 93, and which is configured to stop logical by the second flowing from passage 54
The flowing in road 91.I.e. check valve 93 is configured to the stream by second flow path 91 is prevented when buffer 16 is in compact model
It is dynamic.In this mode, only allow the flowing by passage 82.However, check valve 93 allows to be in expansion mode in buffer 16
When from branched bottom 62 by second flow path 91 to passage 54 flowing.In this mode, it is allowed to by passage 82 and 91
Flowing.
Check valve 93 can be one or more ball check valve valves, one or more valve plates, one or more valve structures
Part or any other suitable one or more check valve.In the embodiment shown, check valve 93 is valve component, and which passes through tightly
Firmware 87 (e.g. bolt or rivet) is held against valve body 85, and is configured to be pushed against when buffer 16 is in compact model
To valve body 85.Valve component be configured to buffer 16 be in expansion mode when pivotally open towards passage 54, from valve body 85 from
Open motion.
Bunper assembly 12 allows the active control of suspension system 10, to change spring rate, damping feature and adjustment
The suspension system height of vehicle 14.Via the first actuator 84 (which is controlled to optionally allow the 3rd plunger 74 to move),
Via the second actuator 86 (which is controlled to optionally allow the second plunger 72 to move) and (which can via electronic controller 88
Arbitrary in startup actuator 84,86 or two in response to the input signal 90 of expression different vehicle service condition described herein
Person) realize active control.Input signal 90 can be the sensor signal that the sensor from vehicle 14 is received, for example, accelerate
Meter, velocity sensor or other appropriate sensors.Alternatively, pressure transducer can orientate the gas in monitoring chamber 42,44 as
Pressure, and the pressure for sensing can provide controller 88 as input signal, as the control for actuating actuator 84,86
A part for algorithm.
First actuator 84 can be electricity, hydraulic pressure, the actuator of pneumatic or any other suitable type.First actuator 84
Can act on cervical region 75 to allow the 3rd plunger 74 to move.For example, controller 88 represents the first mode of operation in input signal 90
Electronic control signal is sent to into actuator when (expecting that buffer 16 has bigger preloading for first mode of operation)
84.Specifically, when plunger 74 is moved in chamber 42 upwards, the gas volume between the first plunger 70 and the 3rd plunger 74 subtracts
It is little, which increase preloading on buffer 16, there is provided bigger counteracting force.
Controller 88 also can control the first actuator 84, to be reduced on buffer 16 by causing plunger 74 to move out
Preload, increase the gas volume between the first plunger 70 and the 3rd plunger 74.So that controller 88 starts actuator 84
Input signal 90 can be operator's input signal, for example, selecting with the related different drive manners for preloading (for example
Motor pattern, etc.).Alternatively or extraly, input signal 90 can be received from the sensor on vehicle 14 or from another controller,
The input signal represents that vehicle experienced certain motion, for example, turn, as by rotating more than predetermined angular A (such as Fig. 2 institutes
Show) wheel 28 determined by, etc..In such mode of operation, bigger counteractive support (reaction is being expected
Support) in the case of to control pitching, upset or rise and fall, controller 88 can start actuator 84 to allow plunger 74 to move.
In one embodiment, the position of plunger 74 can be monitored and the device as thermal expansion in trace buffer 16.
Start control also to realize when controller 88 starts the second actuator 86.Second actuator 86 can be electricity, liquid
Pressure, the actuator of pneumatic or any other suitable type, and act on the cervical region 78 of the second plunger 72 to allow the second plunger 72
Motion.For example, (for second mode of operation, vehicle 14 is expected to illustrate the second mode of operation in varying input signal 90
The adjustment of suspension system height) when, electronic control signal is sent to actuator 86 by controller 88, to allow the second plunger 92 to transport
It is dynamic.Actuator 86 can be acted on the cervical region 78 of plunger 72, allow whole plunger 72 to move towards branched bottom 64.In larger lengths
Cervical region 73 when being subsequently positioned in branched bottom 64, the hydraulic fluid in passage 54 will be forced through flexible pipe 58 and bar 36 is returned
Into in fluid chamber 45, buffer housing 18 is forced to leave from automobile body 17 and increase suspension system height.If it is desire to
Input signal 90 is represented expects lower suspension system height, then reversing process can be implemented by controller 88, and control signal is sent out
Actuator 86 is sent to, to allow plunger 72 to move from branched bottom 64, so that buffer housing 18 is towards automobile body 17
Motion.Fig. 1 shows high suspension system height, and Fig. 6 represents low suspension system height, such as by Fig. 1 and 6 in each
Buffer housing 18 and plunger 72 position shown in.
The controlled motion of plunger 72 may also respond to input signal 90 and implement as mentioned, and the input signal represents gas
The expectation of the spring rate of spring 38 changes.Specifically, when plunger 72 is in position as shown in Figure 1, second gas chamber
Gas in 44 is connected with 42 gaseous fluid of first gas chamber by the window 100 formed by house steward 40.Transport in plunger 72
When moving precalculated position, as shown in fig. 6, window 100 is stopped by the flange 102 of plunger 72, so as in second gas chamber 44
Gas is not connected with the gaseous fluid in first gas chamber 42.(such as in buffer housing 18 from the position of Fig. 1 during compressing
When putting the position for moving to Fig. 6) motion of the first plunger 70 will require that plunger 72 is acted on (only first on the gas of smaller size smaller
The volume between plunger 70 and 72 in gas chamber 42, without any additional volume of secondary chamber 42), thus increase gas
The spring rate of body spring 38.
Although the better model to performing the present invention has carried out detailed description, those skilled in the art can obtain
Know many alternative designs and embodiment for implementing the present invention within the scope of the appended claims.
Claims (10)
1. a kind of vehicle suspension system, including:
Housing, defines that the internal chamber for accommodating incompressible fluid and the hollow bar for supporting piston, bar and piston are extended into
Internal chamber, housing can be moved relative to hollow bar, so as to the fluid volume in internal chamber changes；
Multi-chamber house steward, is operatively connectable to hollow bar and has first gas chamber and second gas chamber；
First plunger, the second plunger and the 3rd plunger are supported by house steward；Wherein the first plunger extend into first gas chamber and
Be in fluid communication via hollow bar and internal chamber, so as to the first plunger in response to housing relative to the motion of hollow bar relative to
First gas chamber movement；Wherein the second plunger is extended into second gas chamber and is connected with internal chamber fluid via hollow bar
It is logical；Wherein the 3rd plunger extends into first gas chamber；
First actuator, it is to allow the 3rd plunger motion that can operate, to change first and the 3rd first gas chamber between plunger
Volume；With
Second actuator, is operable as allowing the second plunger motion, to change the second gas with first gas chamber in fluid communication
The volume of chamber and while change internal chamber in fluid volume, with thus allow housing relative to hollow bar move.
2. vehicle suspension system as claimed in claim 1, further includes:
The passive valve assembly in multi-chamber house steward between hollow bar and the first plunger；With
Wherein passive valve assembly is configured to form pressure drop, so as to the dynamic fluid pressure in hollow bar is more than at the first plunger
Dynamic fluid pressure.
3. vehicle suspension system as claimed in claim 1, wherein the second plunger be configured to moved to by the second actuator it is pre-
The fluid communication that positioning optionally stops between first gas chamber and second gas chamber when putting.
4. vehicle suspension system as claimed in claim 1, further includes:
Hollow bar is operatively connected to house steward, the pipe between hollow bar and house steward is flow through so as to incompressible fluid by pipe.
5. vehicle suspension system as claimed in claim 1, wherein housing and house steward be arranged as it is located adjacent one another, so as to the fortune of housing
The dynamic Motion Parallel generally with the first and second plungers.
6. vehicle suspension system as claimed in claim 1, further includes:
Controller, is operatively connectable to the first and second actuators；Wherein controller is configured in response to the first mode of operation
So that the first actuator allows the 3rd plunger motion, thus to adjust preloading for the first plunger, and it is configured in response to the second behaviour
The second actuator is caused to allow the second plunger motion as state, thus to adjust the spring rate and housing of the first plunger relative in
The static position of empty bar.
7. a kind of vehicle, including:
Tire wheel combination；
Spring carried mass body；
Suspension system, including Bunper assembly, the Bunper assembly are operatively connectable to tire wheel combination and are configured to
To causing wheel to be managed relative to the power that spring carried mass body is shifted, Bunper assembly has:
Hydraulic bjuffer, the hollow bar with the housing and support piston for defining hydraulic chamber, bar and piston extend into liquid
Pressure chamber, housing is fixed to tire wheel combination and hollow bar is fixed to spring carried mass body, and housing can be with tire wheel group
Part is moved relative to hollow bar together, so as to the hydraulic fluid flow volume in hydraulic chamber changes；
Gas spring, which has:
Multi-chamber house steward, is operatively connectable to hydraulic bjuffer and has the first pneumatic chamber and the second pneumatic chamber；
First plunger, the second plunger and the 3rd plunger are supported by house steward；Wherein the first plunger extend into the first pneumatic chamber and
Be in fluid communication via hollow bar and hydraulic chamber, so as to the first plunger in response to housing relative to the motion of hollow bar relative to
First pneumatic chamber movement；Wherein the second plunger extends into the second pneumatic chamber and via hollow bar and fluid company of hydraulic chamber
It is logical；Wherein the 3rd plunger extends into the first pneumatic chamber；
First actuator, it is to allow the 3rd plunger motion that can operate so that the volume of the first pneumatic chamber change and so that
Bunper assembly preloads change；
Second actuator, it is to allow the second plunger motion that can operate, pneumatic with the second of the first pneumatic chamber in fluid communication to change
The volume of chamber and while change the hydraulic fluid flow volume in hydraulic chamber, thus to allow the spring rate and vehicle of gas spring
Suspension system Level Change；With
Controller, is operatively connectable to the first and second actuators and is configured to cause the first rush in response to the first mode of operation
Dynamic device allows the 3rd plunger motion, and is configured in response to the second mode of operation so that the second actuator allows the second plunger motion.
8. vehicle as claimed in claim 7, further includes passive valve assembly, and which is located between hollow bar and the first plunger
In multi-chamber house steward and it is configured to form pressure drop, so as to the dynamic fluid pressure in hollow bar is more than the dynamic at the first plunger
Fluid pressure.
9. vehicle as claimed in claim 7, wherein the second plunger is configured to when precalculated position is moved to by the second actuator
Optionally stop the fluid communication between the first pneumatic chamber and the second pneumatic chamber.
10. a kind of method of control vehicle suspension system, vehicle suspension system have and are connected to tire wheel combination and vehicle
Bunper assembly between spring carried mass body, including:
The first input signal is received, which represents that the expectation of Bunper assembly is preloaded；
The second input signal is received, during which represents the expectation suspension system height of expectation spring rate and vehicle of Bunper assembly
One；
The first actuator is controlled in response to the first input signal, is preloaded with the expectation for setting up Bunper assembly；
The second actuator is controlled in response to the second input signal, to set up expectation spring rate and the phase of vehicle of Bunper assembly
One hoped in suspension system height.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/973,299 US9139064B2 (en) | 2013-08-22 | 2013-08-22 | Damper assembly for vehicle suspension system with fluid damper and multi-chamber gas spring and method of controlling pre-load, spring rate and ride height |
| US13/973,299 | 2013-08-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104417304A CN104417304A (en) | 2015-03-18 |
| CN104417304B true CN104417304B (en) | 2017-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410418318.1A Active CN104417304B (en) | 2013-08-22 | 2014-08-22 | Vehicle suspension system and method of controlling vehicle suspension system |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US9139064B2 (en) |
| CN (1) | CN104417304B (en) |
| DE (1) | DE102014111799B4 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MA45487A (en) * | 2016-03-15 | 2019-01-23 | Quadro Vehicles S A | IMPROVED SUSPENSION |
| US10173489B2 (en) * | 2016-05-11 | 2019-01-08 | Ford Global Technologies, Llc | Vehicle suspension control systems and devices, and related methods |
| US10035400B2 (en) | 2016-07-27 | 2018-07-31 | GM Global Technology Operations LLC | Vehicle suspension system |
| DE102016222485B4 (en) * | 2016-11-16 | 2023-11-16 | Bayerische Motoren Werke Aktiengesellschaft | Control device for adjusting a spring rate and a vehicle level |
| US11161384B2 (en) * | 2018-08-20 | 2021-11-02 | Harley-Davidson Motor Company Group, LLC | Dual hydraulic tank adjuster |
| CN108757806A (en) * | 2018-08-24 | 2018-11-06 | 山东万通液压股份有限公司 | The double gas chamber piston accumulators of hydro pneumatic suspension |
| US10967698B2 (en) * | 2018-12-10 | 2021-04-06 | GM Global Technology Operations LLC | Self-balancing multi-chamber air spring |
| US11498383B2 (en) * | 2020-02-13 | 2022-11-15 | GM Global Technology Operations LLC | Continuously variable rate fluid spring system for a vehicle, and method of operation |
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- 2013-08-22 US US13/973,299 patent/US9139064B2/en active Active
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- 2014-08-22 CN CN201410418318.1A patent/CN104417304B/en active Active
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| FR1505259A (en) * | 1965-12-17 | 1967-12-08 | Fichtel & Sachs Ag | Hydropneumatic suspension with automatic level regulation and oscillation damping |
| US4620694A (en) * | 1980-06-30 | 1986-11-04 | Patrick F. Henry | Hydraulic suspension system for vehicles including adjustable shock absorber unit |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20150054234A1 (en) | 2015-02-26 |
| CN104417304A (en) | 2015-03-18 |
| DE102014111799B4 (en) | 2020-02-27 |
| DE102014111799A1 (en) | 2015-02-26 |
| US9139064B2 (en) | 2015-09-22 |
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